Stories of reproduction are "the bottom line", so to speak, of perceptions of gender and gender difference. We discuss how gender is intricately and inadvertently implied in stories where egg and sperm cells take centre stage; on the one hand the gametes imply the meaning of women and men,...
How many drops of sperm are needed to get pregnant?If your sperm count is normal, you will ejaculate millions and millions of sperm cells. But only one of them is required to fertilize an egg and start a pregnancy. What’s an ideal sperm count for reproduction?You should have at least ...
When females mate with multiple males, sperm cells must compete because only the fittest will beat its rivals to fertilise the egg. This pressure has driven myriad adaptations, including those giant tails in fruit fly sperm. Other examples of super-competitive sperm include those of woodlice, whic...
Sperm, male reproductive cell, produced by most animals. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) the ovum (egg) of a female to produce a new offspring. Mature sperm have two distingu
Spermatazoa are the male gamete,meaning they are the cells that fuse with the egg in fertilization giving rise to the embrion and future baby.
Reconstitution of prospermatogonial specification in vitro from human induced pluripotent stem cells Article Open access 09 November 2020 Introduction Fertilization integrates multiple cell-autonomous processes to transform a sperm and an oocyte (egg) into a totipotent embryo. In mammals, the fertilizing...
In sexual reproduction, interactions between the gamete cells, be they sperm and egg or different mating types, initiate the next generation, so an insight of evolutionary processes relies on understanding factors that influence these ga... TL Karr,WJ Swanson,RR Snook - 《Sperm Biology》 被引量...
Table 1 Milt volume, sperm number, and egg number obtained from recipients receiving in vitro-expanded (Cul-TP) and non-cultured (Non-cul-TP) type A spermatogonia. Full size table Progeny tests were performed to examine the functionality of gametes derived from in vitro-expanded ASGs. Gametes...
Classically, sperm were seen as transcriptionally inactive vehicles for delivering the paternal haplotype to an egg. Yet, it has become apparent that sperm also carry thousands of different RNAs, and the functions of most of these are unknown. Here, we make four novel suggestions for sperm RNA ...
This doesn't mean men and women will soon be donating skin cells rather than sperm and egg at fertility clinics. Eventually, however, the findings could open the door to more intensive research on human genetics and certain cancers, and could impact fertility treatments sometime in the future....